Hydraulic cylinder boom



FIG. 1 is a top perspective view from the right end of a hydraulic cylinder boom embodying my new and ornamental design;

FIG. 2 is a bottom perspective view from the left end thereof;

FIG. 3 is a right end elevation view thereof;

FIG. 4 is a left end elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a front elevational view thereof; and

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a hydraulic cylinder boom, as shown. 